usr/src/cmd/ssh/libssh/common/radix.c

   1 /*
   2  * Copyright (c) 1999 Dug Song.  All rights reserved.
   3  * Copyright (c) 2002 Markus Friedl.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "includes.h"
  27 #include "uuencode.h"
  28
  29 RCSID("$OpenBSD: radix.c,v 1.22 2002/09/09 14:54:15 markus Exp $");
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 #ifdef AFS
  34 #include <krb.h>
  35
  36 #include <radix.h>
  37 #include "bufaux.h"
  38
  39 int
  40 creds_to_radix(CREDENTIALS *creds, u_char *buf, size_t buflen)
  41 {
  42         Buffer b;
  43         int ret;
  44
  45         buffer_init(&b);
  46
  47         buffer_put_char(&b, 1); /* version */
  48
  49         buffer_append(&b, creds->service, strlen(creds->service));
  50         buffer_put_char(&b, '\0');
  51         buffer_append(&b, creds->instance, strlen(creds->instance));
  52         buffer_put_char(&b, '\0');
  53         buffer_append(&b, creds->realm, strlen(creds->realm));
  54         buffer_put_char(&b, '\0');
  55         buffer_append(&b, creds->pname, strlen(creds->pname));
  56         buffer_put_char(&b, '\0');
  57         buffer_append(&b, creds->pinst, strlen(creds->pinst));
  58         buffer_put_char(&b, '\0');
  59
  60         /* Null string to repeat the realm. */
  61         buffer_put_char(&b, '\0');
  62
  63         buffer_put_int(&b, creds->issue_date);
  64         buffer_put_int(&b, krb_life_to_time(creds->issue_date,
  65             creds->lifetime));
  66         buffer_append(&b, creds->session, sizeof(creds->session));
  67         buffer_put_short(&b, creds->kvno);
  68
  69         /* 32 bit size + data */
  70         buffer_put_string(&b, creds->ticket_st.dat, creds->ticket_st.length);
  71
  72         ret = uuencode(buffer_ptr(&b), buffer_len(&b), (char *)buf, buflen);
  73
  74         buffer_free(&b);
  75         return ret;
  76 }
  77
  78 #define GETSTRING(b, t, tlen) \
  79         do { \
  80                 int i, found = 0; \
  81                 for (i = 0; i < tlen; i++) { \
  82                         if (buffer_len(b) == 0) \
  83                                 goto done; \
  84                         t[i] = buffer_get_char(b); \
  85                         if (t[i] == '\0') { \
  86                                 found = 1; \
  87                                 break; \
  88                         } \
  89                 } \
  90                 if (!found) \
  91                         goto done; \
  92         } while(0)
  93
  94 int
  95 radix_to_creds(const char *buf, CREDENTIALS *creds)
  96 {
  97         Buffer b;
  98         u_char *space;
  99         char c, version, *p;
 100         u_int endTime, len;
 101         int blen, ret;
 102
 103         ret = 0;
 104         blen = strlen(buf);
 105
 106         /* sanity check for size */
 107         if (blen > 8192)
 108                 return 0;
 109
 110         buffer_init(&b);
 111         space = buffer_append_space(&b, blen);
 112
 113         /* check version and length! */
 114         len = uudecode(buf, space, blen);
 115         if (len < 1)
 116                 goto done;
 117
 118         version = buffer_get_char(&b);
 119
 120         GETSTRING(&b, creds->service, sizeof creds->service);
 121         GETSTRING(&b, creds->instance, sizeof creds->instance);
 122         GETSTRING(&b, creds->realm, sizeof creds->realm);
 123         GETSTRING(&b, creds->pname, sizeof creds->pname);
 124         GETSTRING(&b, creds->pinst, sizeof creds->pinst);
 125
 126         if (buffer_len(&b) == 0)
 127                 goto done;
 128
 129         /* Ignore possibly different realm. */
 130         while (buffer_len(&b) > 0 && (c = buffer_get_char(&b)) != '\0')
 131                 ;
 132
 133         if (buffer_len(&b) == 0)
 134                 goto done;
 135
 136         creds->issue_date = buffer_get_int(&b);
 137
 138         endTime = buffer_get_int(&b);
 139         creds->lifetime = krb_time_to_life(creds->issue_date, endTime);
 140
 141         len = buffer_len(&b);
 142         if (len < sizeof(creds->session))
 143                 goto done;
 144         memcpy(&creds->session, buffer_ptr(&b), sizeof(creds->session));
 145         buffer_consume(&b, sizeof(creds->session));
 146
 147         creds->kvno = buffer_get_short(&b);
 148
 149         p = buffer_get_string(&b, &len);
 150         if (len < 0 || len > sizeof(creds->ticket_st.dat))
 151                 goto done;
 152         memcpy(&creds->ticket_st.dat, p, len);
 153         creds->ticket_st.length = len;
 154
 155         ret = 1;
 156 done:
 157         buffer_free(&b);
 158         return ret;
 159 }
 160 #endif /* AFS */